I successfully replaced the batteries of several iPhone models that were supposedly ‘full of glue’ without any issues. That stuff was always way overblown. After all, Apple needed to be able to replace the batteries themselves.
Burning the screen has always been a bit silly. And he probably should have switched to more reproducible/quantifiable tests for durability a long time ago. I don't mind his videos, but there's a clear lack of rigor and it's odd that iFixit would want to associate with that.
